The bulb in the visor for the mirror went out.... I was trying to find a bulb number for it, but couldn't find it?

 

serrano, for your '96 ES, the bulb no. should be either 161, DE3021, or 194. Here is the Sylvania bulb page, listed as "step/courtesy light".

You might want to remove the bulb first and inspect the labeled bulb # to be certain. All you need is a small flathead, and just pry out the light cover at the notch real carefully.

 

Just take the cover off and bring the bulb to your local auto parts store to get a replacement.